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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Texas Instruments SN74ALVCH16827DL

Name: SN74ALVCH16827DL
Brand: Texas Instruments
SKU: SN74ALVCH16827DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVCH16827DL

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74ALVCH16827DL.pdf

Description:: IC BUF NON-INVERT 3.6V 56SSOP

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Product details

Overview

SN74ALVCH16827DL from Texas Instruments is a 20-bit noninverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features dual 10-bit sections with independent output-enable control (1OE1/1OE2 and 2OE1/2OE2), bus-hold circuitry on all data inputs, and operates across –40°C to 85°C. It is used in high-density memory address/data buffering and backplane interface applications requiring level translation and bus isolation.

For engineers reviewing the SN74ALVCH16827DL datasheet, SN74ALVCH16827DL pinout, SN74ALVCH16827DL application, or SN74ALVCH16827DL equivalent, key selection considerations include its 56-pin SSOP (DL) package, dual-section 3-state enable logic, bus-hold input retention, ±24-mA drive strength at 3 V, and compatibility with mixed-voltage 1.8-V/2.5-V/3.3-V systems.

Technical Context

This device implements two independent 10-bit noninverting buffers, each requiring both OE inputs low to activate outputs; either OE high forces that section's Y outputs into high-impedance. The bus-hold circuitry maintains valid logic levels on unused A inputs without external resistors, reducing BOM count and layout complexity.

It uses TI's EPIC™ submicron CMOS process, delivering ESD robustness (>2000 V HBM), latch-up immunity (>250 mA per JESD 17), and rail-to-rail input/output voltage tolerance (–0.5 V to V_CC + 0.5 V). Propagation delay is 3.4 ns typical at 3.3 V, with enable/disable times under 6 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - supports interoperability across 1.8-V, 2.5-V, and 3.3-V logic domains
Output Drive	±24 mA at 3 V - sufficient to drive 50-pF loads with fast edge rates in dense PCB layouts
Propagation Delay	3.4 ns typical at 3.3 V - enables timing-critical address/data path buffering up to ~150 MHz
Bus-Hold Current	±75 µA at 3 V - actively retains input state without pullup/pulldown resistors, simplifying unconnected input handling
Operating Temperature	–40°C to 85°C - qualified for industrial-grade embedded and communications equipment
I/O Voltage Range	–0.5 V to V_CC + 0.5 V - allows safe interfacing with overvoltage-tolerant or hot-swap-capable systems
Quiescent Current	40 µA max at 3.6 V - minimizes static power in always-on buffer stages

Pinout & Package

SN74ALVCH16827DL is housed in a 56-pin Shrink Small-Outline Package (SSOP), DL variant, with 0.5-mm lead pitch, 13.9–14.1 mm body width, and 1.2-mm maximum height. Pin 1 is marked by a beveled corner and located at top-left when viewed from top with marking side up.

Pin/Terminal	Circuit Role	Design Meaning
1OE1, 1OE2, 2OE1, 2OE2	Section Output Enable Inputs	Active-low dual-enable logic: both OE pins per 10-bit section must be low to enable Y outputs; any high disables that section
1A1–1A10, 2A1–2A10	Data Inputs	20 buffered inputs with integrated bus-hold - retain last valid logic state when floating, eliminating external biasing
1Y1–1Y10, 2Y1–2Y10	3-State Outputs	20 noninverting outputs; high-impedance when corresponding OE pair is not both asserted
V_CC (Pins 7, 22, 36, 47, 50)	Power Supply	Five distributed V_CC pins reduce switching noise and improve PSRR across wide bus operation
GND (Pins 4, 11, 18, 29, 33, 40, 46, 53)	Ground Reference	Eight GND pins provide low-inductance return paths, critical for signal integrity in 20-bit parallel interfaces

Key Features

Feature	Design Value
Dual 10-bit independent sections	Enables selective bus gating - one section can drive while the other remains isolated, supporting partial bus updates
Integrated bus-hold on all 20 inputs	Eliminates need for 20 external pullup/pulldown resistors, saving board space and reducing assembly cost
Wide V_CC range (1.65 V–3.6 V)	Permits direct connection between 1.8-V controllers and 3.3-V peripherals without level shifters
EPIC™ submicron CMOS process	Delivers high-speed performance with low dynamic power and industry-leading ESD/latch-up robustness
56-pin SSOP (DL) package	Offers higher pin density than standard SOIC while maintaining hand-solderability and legacy footprint compatibility

Applications

Memory Address Buffering	Backplane Data Interface
Use Scenario: Buffering 20-bit address lines between a microcontroller and multiple SRAM/Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing isolation, drive strength, and voltage-level compatibility between controller and memory chips. Use Value: Prevents address bus contention during memory bank switching; bus-hold maintains stable addresses during chip select transitions.	Use Scenario: Driving parallel data signals across a 20-line backplane in modular industrial I/O systems. IC Role / Device Role / Timing Role: High-drive buffer ensuring signal integrity over longer traces and multiple connectors. Use Value: ±24-mA output current sustains logic margins across 10-cm+ backplane runs; dual OE control enables hot-plug-safe module enable/disable.
FPGA I/O Expansion	Mixed-Voltage System Interfacing
Use Scenario: Expanding FPGA GPIO count to drive external peripherals where native I/O is insufficient or voltage-incompatible. IC Role / Device Role / Timing Role: Level-translating buffer extending FPGA I/O capability while preserving timing predictability. Use Value: 3.4-ns propagation delay ensures tight setup/hold timing margins; bus-hold prevents floating inputs during FPGA configuration.	Use Scenario: Interfacing a 1.8-V ASIC with a 3.3-V ADC or DAC in a sensor signal chain. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe communication across supply domains. Use Value: Input tolerance to –0.5 V and V_CC + 0.5 V allows robust operation during supply sequencing mismatches.

Memory Address Buffering

Backplane Data Interface

Use Scenario: Buffering 20-bit address lines between a microcontroller and multiple SRAM/Flash devices on a shared bus.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing isolation, drive strength, and voltage-level compatibility between controller and memory chips.

Use Value: Prevents address bus contention during memory bank switching; bus-hold maintains stable addresses during chip select transitions.

Use Scenario: Driving parallel data signals across a 20-line backplane in modular industrial I/O systems.

IC Role / Device Role / Timing Role: High-drive buffer ensuring signal integrity over longer traces and multiple connectors.

Use Value: ±24-mA output current sustains logic margins across 10-cm+ backplane runs; dual OE control enables hot-plug-safe module enable/disable.

FPGA I/O Expansion

Mixed-Voltage System Interfacing

Use Scenario: Expanding FPGA GPIO count to drive external peripherals where native I/O is insufficient or voltage-incompatible.

IC Role / Device Role / Timing Role: Level-translating buffer extending FPGA I/O capability while preserving timing predictability.

Use Value: 3.4-ns propagation delay ensures tight setup/hold timing margins; bus-hold prevents floating inputs during FPGA configuration.

Use Scenario: Interfacing a 1.8-V ASIC with a 3.3-V ADC or DAC in a sensor signal chain.

IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe communication across supply domains.

Use Value: Input tolerance to –0.5 V and V_CC + 0.5 V allows robust operation during supply sequencing mismatches.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Lower drive (±24 mA only at 3.3 V); no bus-hold; 48-pin TSSOP	Lacks input retention - requires external biasing for unused pins; smaller pin count limits per-section granularity	Choose when bus-hold is unnecessary and board space favors 48-pin TSSOP over 56-pin SSOP
SN74AVC16835DGGR	Higher speed (2.2 ns t_pd), lower V_CC min (1.2 V), but no bus-hold; 56-pin TSSOP	Better for ultra-high-speed 1.2-V/1.5-V systems; lacks bus-hold, increasing design complexity for floating inputs	Prefer when operating below 1.65 V or requiring sub-2.5-ns timing; accept added resistor overhead

Compared with SN74LVC16244ADGGR and SN74AVC16835DGGR, the SN74ALVCH16827DL uniquely combines bus-hold functionality, dual-section independent enable, and industrial temperature range in a single 56-pin SSOP - making it optimal for robust, maintenance-free 20-bit buffering in mixed-voltage industrial designs.

Availability

SN74ALVCH16827DL is available at Aetrix Electronics and suitable for memory subsystems, backplane interconnects, and FPGA I/O expansion requiring stable component supply, long-term industrial lifecycle support, and consistent SSOP packaging.

Supply support for SN74ALVCH16827DL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability interface ICs.

The SN74ALVCH16827DL belongs to TI's Widebus™ family of high-density logic buffers, engineered specifically for noise-immune, low-power, mixed-voltage parallel bus interfacing in industrial and communications infrastructure.

FAQ

What is the function of the dual OE inputs (e.g., 1OE1 and 1OE2) on the SN74ALVCH16827DL?

The SN74ALVCH16827DL requires both 1OE1 and 1OE2 to be low simultaneously to enable the first 10-bit output section (1Y1–1Y10); if either is high, those outputs enter high-impedance. This dual-enable architecture prevents partial activation and enhances system-level fault containment. The same logic applies to 2OE1/2OE2 for the second section.

Does the SN74ALVCH16827DL require external pullup resistors on its input pins?

No - the SN74ALVCH16827DL integrates active bus-hold circuitry on all 20 data inputs (1A1–1A10 and 2A1–2A10), which maintains the last valid logic state without external components. This eliminates the need for pullup or pulldown resistors on unused or unterminated inputs, reducing BOM cost and PCB area.

What is the maximum output current rating for the SN74ALVCH16827DL, and at what V_CC is it specified?

The SN74ALVCH16827DL delivers ±24 mA per output at V_CC = 3.0 V, as confirmed in the Electrical Characteristics table. At lower supplies (e.g., 1.65 V), output drive reduces to ±4 mA. Continuous current per output is limited to ±50 mA absolute maximum, with total package current capped at ±100 mA across all V_CC/GND pins.

Can the SN74ALVCH16827DL operate safely with V_CC = 1.8 V and interface with 3.3-V logic?

Yes - the SN74ALVCH16827DL is fully specified from 1.65 V to 3.6 V. Its inputs tolerate voltages up to V_CC + 0.5 V (so 2.3 V at 1.8 V supply), and outputs swing rail-to-rail. When V_CC = 1.8 V, VOH is ≥1.2 V (sufficient for 3.3-V TTL input thresholds), and VOL is ≤0.45 V - enabling reliable interfacing with 3.3-V systems via appropriate threshold alignment.

What package type and dimensions does the SN74ALVCH16827DL use, and how does it differ from the DGG variant?

The SN74ALVCH16827DL uses a 56-pin SSOP (Shrink Small-Outline Package) with 0.5-mm pitch, 13.9–14.1 mm width, and 1.2-mm max height. Unlike the DGG (TSSOP) variant, the DL package has a wider body and different lead form optimized for tube packaging (20 units/tube vs. 2000/reel), offering distinct handling and reflow profile characteristics while maintaining identical pinout and electrical behavior.

SN74ALVCH16827DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVCH

Package/Case:: 56-BSSOP (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 10

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-SSOP

SN74ALVCH16827DL FAQ

1.How can I place an order for SN74ALVCH16827DL through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVCH16827DL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SN74ALVCH16827DL reliable?

The price and inventory of SN74ALVCH16827DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16827DL is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH16827DL transactions.

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4.How is shipping managed for SN74ALVCH16827DL?

SN74ALVCH16827DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVCH16827DL order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SN74ALVCH16827DL?

For technical support, including SN74ALVCH16827DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16827DL requirements.

6.How does Aetrix verify that SN74ALVCH16827DL is sourced from the original manufacturer or authorized distributors?

All SN74ALVCH16827DL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74ALVCH16827DL meets industry standards.

7.What is the process for return or replacement of SN74ALVCH16827DL?

All SN74ALVCH16827DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16827DL, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SN74ALVCH16827DL part is unused and in its original packaging.

Return procedure for SN74ALVCH16827DL:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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